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310304

Category: DOS extenders
Flags: available only in protected mode

INT 31 - DPMI 0.9+ - FREE REAL MODE CALLBACK ADDRESS

	AX = 0304h
	CX:DX = real mode callback address
Return: CF clear if successful
	CF set on error
	    AX = error code (DPMI 1.0+) (8024h) (see #03143)
Note:	the limited DPMI host built into Phar Lap's 286|DOS-Extender v2.5 does
	  not support this function
SeeAlso: AX=0303h

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